public async Task <DtoCourse> GetCourse(int courseId)
{
try
{
using (var data = Context)
return(CourseConverter.DataAccsessToDto(await(from item in data.Courses where item.id == courseId select item).FirstOrDefaultAsync()));
}
catch (Exception)
{
return(null);
}
}
public async Task <ObservableCollection <DtoCourse> > GetCourses(string filter = null)
{
var ret = new ObservableCollection <DtoCourse>();
using (var data = Context)
{
if (!string.IsNullOrWhiteSpace(filter))
{
foreach (var item in await(from item in data.Courses where item.name.Contains(filter) select item).ToListAsync())
{
ret.Add(CourseConverter.DataAccsessToDto(item));
}
}
else
{
foreach (var item in await(from item in data.Courses select item).ToListAsync())
{
ret.Add(CourseConverter.DataAccsessToDto(item));
}
}
return(ret);
}
}